[600MRG] Modes?

[Eric NO3M]

THOR would be equivalent to a conversational JT9/JT-65.  The nice thing 
about THOR or DominoEX is that it uses IFSK (incremental shift keying), 
so there is no need for absolute tuning accuracy.  It goes as far as 
still being able to decode if you are slowly moving the VFO during 
reception.  It also handles well under low SNRs, especially with FEC 
(inherent with THOR, optional with DominoEX).

73 Eric NO3M / WG2XJM

On 02/08/2014 05:18 PM, Edward R Cole wrote:
> Seems that JT65 and its variants have been successful for making 
> contacts (it is FSK).  Perhaps we can petition a request to Joe Taylor 
> for a conversational text version of the program?  Many mw hams have 
> been experimenting with JT65 and WSPR where such a program would be 
> appreciated.
>
> High winds this weekend (some areas up to 73mph) have my eme array and 
> inverted-L lowered.  I did repair the broken vertical wire (one of 
> three) last week, but have not tested it on 600m.
>
> 73, Ed - KL7UW
>
> At 12:36 PM 2/8/2014, John Andrews wrote:
>> Jim,
>>
>> Should this become a ham band here in the U.S., I would expect some 
>> PSK31 activity. A lot of software supports it, and people are used to 
>> it. As you indicate, a linear amp is needed for PSK, and that will be 
>> a limitation. Also, forward error correction has proven to be very 
>> valuable with the noise and fading at these frequencies, and PSK31 
>> lacks it. The CMSK program by ZL2AFP is an alternative for non-linear 
>> PA's, but it honestly hasn't proven to be all that robust under real 
>> band conditions, despite its success "down under".
>>
>> There are a bunch of other modes suitable for ragchew QSO's, such as 
>> MFSK and THOR that have FEC, and don't require a linear PA. Unless we 
>> get to the point that linear PA's  are common, like on HF, I suspect 
>> that the various FSK modes will be more popular than the PSK variants.
>>
>> John, W1TAG
>>